Determination of Total Selenium and Arsenic in Coal by Wet Digestion Hydride Generation Atomic Fluorescence Spectrometry (HG-AFS)
文献类型：SCI/SSCI论文
| 作者 | Ni R. X.; Luo, K. L. |
| 发表日期 | 2015 |
| 关键词 | Coal Arsenic Selenium Wet digestion HG-AFS recent advance |
| 英文摘要 | In the present work we presented a new method for determination of total Se and As in coal by electric hot plate-mixed acids-hydride generation atomic fluorescence spectrometry (HG-AFS), the wet digestion method. The detailed operation procedures of the new method are as follows: About 0.05 similar to 0.10 g of powdered (200 mesh) coal sample was placed in a glass beaker, 10 mL of nitric acid (HNO3) and 2 mL of perchloric acid (HClO4) were added to the beaker in sequence, then the beaker was covered with a watching glass and placed in a fume cupboard standing overnight. The beaker was placed on an electric hot plate (180 degrees C) for sample decomposition the next day. The beaker was moved away from the electric hot plate when white smoke arose in the beaker, the sample color turned white or grey and the solution turned clear. Three milliliter of hydrochloric acid (HCl) solution (6 mol . L-1) was added to the beaker after the temperature of the beaker returned to room temperature. The beaker was heated on the electric hot plate again, and then moved away when white smoke started arising again. One milliliter of HCl was added in the beaker after the temperature of the beaker returned to room temperature. After that, the digested sample was transferred to a 25 mL test tube which was filled with ultrapure water to the tube's full volume. This solution was used for Se determination directly. Three milliliter of the Se test solution prepared above was transferred to a 15 mL glass test tube, 1 mL of thiourea/ascorbic acid solution (2.5 g . mL(-1)) and 1 mL of the concentrated HCl was added to the 15 mL test tube. The test tube was then filled with ultrapure water to its full volume. The solution was used for As determination after shaking well and 40 min standing. Finally, Se and As concentrations in these prepared solutions were measured by using the AFS-9780 instrument (Beijing Haiguang Instrument Co., LTD, Beijing, China). Two Chinese Coal Certified Reference Materials (GBW11115 and GBW11117) were tested using this method, and the recoveries of As were 99.7%similar to 100.3% and the relative standard deviation (RSD) for As and Se were 5.6%similar to 6.0% and 11.1%similar to 13., respectively. The limits of detection (LOD) of the method for Se and As determination were 0.01 and 0.05 mu g . L-1, respectively. These results indicated that this new method was suitable for Se and As determination in coal, and it had the advantages of simple operation, high accuracy and reproducibility compared with the Chinese National Standard method. |
| 出处 | Spectroscopy and Spectral Analysis |
| 卷 | 35 |
| 期 | 5 |
| 页 | 1404-1408 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1000-0593 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38472]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Ni R. X.,Luo, K. L.. Determination of Total Selenium and Arsenic in Coal by Wet Digestion Hydride Generation Atomic Fluorescence Spectrometry (HG-AFS). 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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